C. hirta

C. hirta may refer to:
 * Caladenia hirta, an orchid species in the genus Caladenia
 * Calamidia hirta, a moth species found in Australia, from Queensland to Tasmania
 * Calamagrostis hirta, a grass species found only in Ecuador
 * Carex hirta, a sedge species in the genus Carex
 * Cladophlebis hirta, an extinct fern species which grew during the Mesozoic and late Paleozoic eras
 * Clidemia hirta, the soapbush or Koster's curse, a perennial shrub species invasive in many tropical regions of the world
 * Crocidura hirta, the lesser red musk shrew, a mammal species found in Africa
 * Cyrtophora hirta, a spider species in the genus Cyrtophora found in Queensland